Roller remover



Jan. 10, ,1 928.

S. HELFGOTT ROLLER REMOVER Filed Nov. 15. 1926 INVENTOR: 5. HELFGO TT BYms ATTORNEY knon nobwn u n n n vnh vvu.

Patented Jan. 10, 1928.

UNITED STATES,

SOLOMON HELFGOTT, OF NEW YORK, N. Y.

ROLLER REMOVER.

Application filed November 15, 1926. Serial No. 148,390.

This invention relates to watch makers toolsand more particularly to anovel and improved roller remover which may be easily detached from thebalance stafi or pivot when necessary as in the repairing of a watch.

One of the objects of my invention is to provide a roller engaging andclamping tool constructed and arranged to permit the roller to beseparated from the pivot or balance staff, hair spring and Watch wheelwithout injury or defacing any of the same incident to their handling.

A further object of my invention is to provide a roller engaging andclamping tool capable of use in connection with any size roller of awatch including means for forcing the pivot or balance staff throughsaid roller for separation therefrom.

Another object of my invention is to pro vide a watch makers tool whichis extremely simple in construction, easily handled and manipulated,comprises but few parts which may be easily assembled, practicable,compact and having other uses in handling and removing the delicateparts of a watch mechanism.

To enable others skilled in the art to more fully comprehend theunderlying features of my invention that they may embody the same in themany practical advantages over other instruments of a similar nature,reference is bad to the accompanying drawing wherein Fig. l is aperspective view showing the tool.

Fig. 2 is a top plan showing the clamping or gripping end of the tool.

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Fig. 4 is a view similar to Fig. 3and showing the manner of gripping andclamping the roller for its removal.

Referring now to the drawing wherein like reference characters designatecorre-' sponding parts, 5 designates a tubular, tool body having aninternally threaded bore for a threaded stem 6 formed preferablyintegral with the end body section 7. The stem 6 is provided with arigid pin 7 that extends into a socket 8 above the shoulder 9 whichlimits the inward movement of the stem.

On the rigid pin and within the socket 8 there is provided a resilientspring 10, one end of the spring bearing on the end of the threaded stemand the opposite end en aging the end 11 oi a push rod 12 which extendsthrough a bore of the opposite end of the tubular body 5. The push rod12 is provided with a stop collar 13 which prevents its withdrawal fromthe tubular body but permits it to be urged inwardly against theresistance of the spring, as shown by Fig. 4 of the drawing.

The push rod is held between a. pair of clamping jaws 14, 15, each ofwhich is semispherical in cross section and connected by narrow strips16 to a collar 17, said collar being located in the upper end of thebody and securely held therein by the screw 18.

It will be noted that the jaws 14;, 15 taper slightly from the bottomportion 19 to the top flange 20, said jaws having a clamping or lockingsleeve 21 which may be moved downwardly to the position shown by Fig. 4tfor instance so that the top flange of each of the jaws may engageroller 22.

The upper end of the push rod 12 is of reduced thickness andconsiderably less in diameter as shown by 23 and is provided with a pinhole in the top in which the pivot post may be set and centered togetherwith the spring as and watch wheel 25 from which the roller is to bedisconnected.

It will be seen that when the post is set on the reduced end of the pushrod and the jaws 14, 15 are in their normally se )arated or spacedrelation as illustrated by Fig. 3, the lower portion of the roller willbe below the flanges 20 and that when the locking sleeve is moveddownwardly, the said roller will be clamped and locked. While the springtends to force the push rod outwardly, the said push rod is free to move'inwardly when the threaded stem is partially 'unthreaded. Since thepush rod and post are in engagement, as the threaded stem is rotated,the push rod will be forced outwardly and consequently urged through andbecome separated from the roller which is held tightly in clampedrelation by the flanged portion of the jaws. The post, hair spring andwatch wheel are thus removed from the roller as a unit without damage toany of the parts.

Having shown and described my invention what I now claim as new anddesire to secure by Letters Patent is:

1. A roller remover comprisin a tubular body, tapered clamping jawshaving a look ing sleeve cooperating therewith connected to one end ofthe body, apush rod between llu the jaws and extending within the saidbody, the outer end or said push rod'being disposed for movementrelative to the outer ends of the clamping jaws to engage the pivot postof a roller mounted on a watch mechanism and a threaded stem in theopposite end of the tubular body for advancing the push rod whereby thepost may be disengaged from the roller.

2. A roller remover comprising a tubular body, clamping jaws havingsegmental flanged outer ends for engaging the periphery of a rollermounted on the pivot post of a watch mechanism, a locking sleevecooperating with said clamping jaws, a push rod between the jaws andadapted to engage the pivot post of said roller and a threaded stem foradvancing said push rod whereby the pivot post may be disengaged fromthe roller when held by the clamping jaws.

3. A roller remover comprising a tubular body, a collar connected to oneend of said body and having tapered clamping jaws semi-circular in crossSection, 21 resiliently controlled push rod extending within the bodyand disposed between the jaws, a locking sleeve on said jaws forclamping a roller therebetween and a threaded stem within the oppositeend of the body for advancing the push rod between and beyond said jawsto disengage the roller from a pivot post.

4. A roller remover comprising a tubular body, a collar connected to oneend of said body andhaving tapered clamping jaws, semi-circular in crosssection, for engaging the periphery of a roller, a push rod extendingwithin a socket or" the tubular body,.

said push rod being adapted to engage a pivot post on which said rolleris mounted, and, a threaded stem within the oppositeend of the tubularbody for advancing the push rod to disengage the roller from the pivotpost.

In testimony whereof I afiix my'signature. v

SOLOMON I-IELFGOTT.

